It’s nothing new when celebs come down to the streets and take time out for a social cause. Preity Zinta has swept the streets of Mumbai, Aamir Khan has joined a hunger strike, Abhay Deol writes articles on environmental issues every now and then; and now the newest member hopping onto the bandwagon is Priyanka Chopra, who was seen wielding a rake and sweating it out to clean the polluted river on Monday. Click here to read more